Putting on my Master of the Obvious hat, I would say that I would expect that a 12 GHz receiver would generate some frequencies in excess of the 50 MHz DSP, for a local oscillator, say. But you shouldn't have to test to multiples of the LO frequency, since it is a clean cw signal. Testing up to the highest LO frequency ought to be sufficient. So I would say you should test up to 5X the clock frequency, and then also at frequencies that the LO can be tuned to. In fact, I believe there are special requirements to make sure LOs don't radiate out of receiver-connected antennas, right?
on 8/20/02 11:23 AM, Grasso, Charles at charles.gra...@echostar.com wrote: > > Hi - and just when I thought I had it all > figured out.. > > I have a question on the FCC requirement to test > a product to the highest frequency used. > > Say a company has an RF receiver that has a > DSP processor in it running at 50MHz. Lets > also say that said receiver is pointed at a > transmitter that has a 12Ghz signal. > > Should I test the receiver to > a) 5X the 50MHz or > b) 5x the 12GHz transmitter signal? > > We have an FCC interpretation - bet you > can't guess what it is.. > > Charles Grasso > Senior Compliance Engineer > Echostar Technologies Corporation > phone: 303.706.5467 > FAX: 303.799.6222 > > Charles Grasso > Senior Compliance Engineer > Echostar Technologies Corporation > phone: 303.706.5467 > FAX: 303.799.6222 > > ------------------------------------------- > This message is from the IEEE EMC Society Product Safety > Technical Committee emc-pstc discussion list. > > Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/ > > To cancel your subscription, send mail to: > majord...@ieee.org > with the single line: > unsubscribe emc-pstc > > For help, send mail to the list administrators: > Ron Pickard: emc-p...@hypercom.com > Dave Heald: davehe...@attbi.com > > For policy questions, send mail to: > Richard Nute: ri...@ieee.org > Jim Bacher: j.bac...@ieee.org > > All emc-pstc postings are archived and searchable on the web at: > http://ieeepstc.mindcruiser.com/ > Click on "browse" and then "emc-pstc mailing list" > -- Ken Javor EMC Compliance Huntsville, Alabama 256/650-5261 ------------------------------------------- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/ To cancel your subscription, send mail to: majord...@ieee.org with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Ron Pickard: emc-p...@hypercom.com Dave Heald: davehe...@attbi.com For policy questions, send mail to: Richard Nute: ri...@ieee.org Jim Bacher: j.bac...@ieee.org All emc-pstc postings are archived and searchable on the web at: http://ieeepstc.mindcruiser.com/ Click on "browse" and then "emc-pstc mailing list"
